genética1ªlei - monoibridismo -
TRANSCRIPT
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Magabiológica
GENÉTICA
Iª LEI DE MENDEL MONOIBRIDISMO
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Gregor Johann Mendel (1822 —1884) Monge agostiniano, botânico e meteorologista austríaco.
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Grão de Polén
Oosfera
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X
100%
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X
100%
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XP-
F1- 100% -
Híbridos
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XF1-
F2-
75% 25%3:1
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X
100%
AA AA
AA AA AA AA
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X
100%
aa aa
aa aa aa aa
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XP-
F1-
100% - Híbridos
AA aa
Aa Aa Aa Aa
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XF1-
F2-
75% 25%3:1
Aa Aa
AA Aa Aa aa
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1° Lei de Mendel
Mendel conclui que os fatores (genes) seriam transmitidos aos descendentes através dos gametas. Entretanto, esses “fatores” separam-se durante processo de formação dos gametas de forma que cada gameta herdaria apenas um “fator” de cada par.
Lei da pureza dos gametas, Lei da Segregação dos fatores ou monoibridismo.
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Herança na forma da asa da Drosophila
CASOS DE MONOHIBRIDISMO
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Herança na forma da folha de Coleus blumei
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Enrolar a língua - Dominante
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Albino - Recessivo
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Polidactilia - Dominante
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SÍMBOLOS UTILIZADOS NOS HEREDOGRAMAS
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Fonte:Blog: http://biologiaquepariu.blogspot.comProfº Fabiano Reis